mirror of
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314 lines
7.8 KiB
C
314 lines
7.8 KiB
C
/* SSNES - A Super Nintendo Entertainment System (SNES) Emulator frontend for libsnes.
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* Copyright (C) 2010-2011 - Hans-Kristian Arntzen
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*
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* Some code herein may be based on code found in BSNES.
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*
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* SSNES is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* SSNES is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with SSNES.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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// Loader for external API plugins.
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#define SSNES_DLL_IMPORT
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#include "ext/ssnes_video.h"
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#include <stdbool.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include "dynamic.h"
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#include "general.h"
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static bool g_input_dead = true;
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static bool g_video_dead = true;
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static dylib_t g_lib = NULL;
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/////////// Input hook
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typedef struct
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{
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const ssnes_input_driver_t *driver;
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void *handle;
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} input_ext_t;
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static void* input_ext_init(void)
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{
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g_input_dead = false;
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return calloc(1, sizeof(input_ext_t));
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}
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static void input_ext_poll(void *data)
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{
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input_ext_t *ext = data;
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ext->driver->poll(ext->handle);
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}
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static int16_t input_ext_input_state(void *data, const struct snes_keybind **snes_keybinds, bool port, unsigned device, unsigned index, unsigned id)
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{
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input_ext_t *ext = data;
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unsigned player = 0;
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if (device == SNES_DEVICE_MULTITAP)
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player = (port == SNES_PORT_1) ? 1 : index + 2;
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else
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player = (port == SNES_PORT_1) ? 1 : 2;
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const struct snes_keybind *ssnes_bind = NULL;
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for (unsigned i = 0; g_settings.input.binds[player - 1][i].id != -1; i++)
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{
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if (g_settings.input.binds[player - 1][i].id == id)
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{
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ssnes_bind = &g_settings.input.binds[player - 1][i];
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break;
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}
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}
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if (ssnes_bind)
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{
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struct ssnes_keybind bind = {
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.key = ssnes_bind->key,
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.joykey = ssnes_bind->joykey,
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.joyaxis = ssnes_bind->joyaxis
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};
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return ext->driver->input_state(ext->handle, &bind, player);
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}
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else
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return 0;
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}
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static bool input_ext_key_pressed(void *data, int key)
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{
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input_ext_t *ext = data;
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const struct snes_keybind *ssnes_bind = NULL;
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for (unsigned i = 0; g_settings.input.binds[0][i].id != -1; i++)
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{
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if (g_settings.input.binds[0][i].id == key)
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{
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ssnes_bind = &g_settings.input.binds[0][i];
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break;
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}
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}
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if (ssnes_bind)
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{
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struct ssnes_keybind bind = {
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.key = ssnes_bind->key,
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.joykey = ssnes_bind->joykey,
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.joyaxis = ssnes_bind->joyaxis
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};
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return ext->driver->input_state(ext->handle, &bind, 1);
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}
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else
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return false;
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}
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static void input_ext_free(void *data)
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{
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input_ext_t *ext = data;
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if (ext)
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{
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if (ext->driver && ext->handle)
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ext->driver->free(ext->handle);
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if (g_video_dead)
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{
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dylib_close(g_lib);
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g_lib = NULL;
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}
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g_input_dead = true;
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free(ext);
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}
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}
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static const input_driver_t input_ext = {
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.init = input_ext_init,
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.poll = input_ext_poll,
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.input_state = input_ext_input_state,
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.key_pressed = input_ext_key_pressed,
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.free = input_ext_free,
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.ident = "ext"
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};
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//////////// Video hook
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typedef struct
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{
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const ssnes_video_driver_t *driver;
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void *handle;
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} ext_t;
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static void video_ext_free(void *data)
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{
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ext_t *ext = data;
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if (ext)
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{
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if (ext->driver && ext->handle)
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ext->driver->free(ext->handle);
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if (g_input_dead)
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{
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dylib_close(g_lib);
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g_lib = NULL;
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}
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g_video_dead = true;
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free(ext);
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}
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}
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static bool video_ext_focus(void *data)
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{
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ext_t *ext = data;
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return ext->driver->focus(ext->handle);
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}
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static bool video_ext_alive(void *data)
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{
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ext_t *ext = data;
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return ext->driver->alive(ext->handle);
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}
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static void video_ext_set_nonblock_state(void *data, bool state)
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{
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ext_t *ext = data;
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ext->driver->set_nonblock_state(ext->handle, state);
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}
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static bool video_ext_frame(void *data, const void *frame, unsigned width, unsigned height, unsigned pitch, const char *msg)
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{
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ext_t *ext = data;
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return ext->driver->frame(ext->handle, frame, width, height, pitch, msg);
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}
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static void* setup_input(ext_t *ext, const ssnes_input_driver_t *driver)
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{
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int joypad_index[5];
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for (unsigned i = 0; i < 5; i++)
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joypad_index[i] = g_settings.input.joypad_map[i] == SSNES_NO_JOYPAD ? -1 : g_settings.input.joypad_map[i];
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void *handle = driver->init(joypad_index, g_settings.input.axis_threshold);
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if (!handle)
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return NULL;
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input_ext_t *wrap_handle = input_ext.init();
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if (!wrap_handle)
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return NULL;
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wrap_handle->handle = handle;
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wrap_handle->driver = driver;
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return wrap_handle;
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}
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static bool setup_video(ext_t *ext, const video_info_t *video, const input_driver_t **input, void **input_data)
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{
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SSNES_LOG("Loaded driver: \"%s\"\n", ext->driver->ident ? ext->driver->ident : "Unknown");
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if (SSNES_GRAPHICS_API_VERSION != ext->driver->api_version)
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{
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SSNES_ERR("API version mismatch detected!\n");
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SSNES_ERR("Required API version: %d, Library version: %d\n", SSNES_GRAPHICS_API_VERSION, ext->driver->api_version);
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return false;
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}
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ssnes_video_info_t info = {
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.width = video->width,
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.height = video->height,
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.fullscreen = video->fullscreen,
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.vsync = video->vsync,
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.force_aspect = video->force_aspect,
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.aspect_ratio = g_settings.video.aspect_ratio,
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.smooth = video->smooth,
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.input_scale = video->input_scale,
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.color_format = video->rgb32 ? SSNES_COLOR_FORMAT_ARGB8888 : SSNES_COLOR_FORMAT_XRGB1555,
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.xml_shader = g_settings.video.bsnes_shader_path,
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.cg_shader = g_settings.video.cg_shader_path,
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.ttf_font = *g_settings.video.font_path ? g_settings.video.font_path : NULL,
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.ttf_font_size = g_settings.video.font_size
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};
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const ssnes_input_driver_t *input_driver = NULL;
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ext->handle = ext->driver->init(&info, &input_driver);
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if (!ext->handle)
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return false;
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*input = input_driver ? &input_ext : NULL;
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if (input_driver)
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*input_data = setup_input(ext, input_driver);
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else
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*input_data = NULL;
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return true;
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}
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static void* video_ext_init(const video_info_t *video, const input_driver_t **input, void **input_data)
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{
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ext_t *ext = calloc(1, sizeof(*ext));
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if (!ext)
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return NULL;
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if (!(*g_settings.video.external_driver))
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{
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SSNES_ERR("External driver needs video_external_driver path to be set!\n");
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goto error;
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}
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g_lib = dylib_load(g_settings.video.external_driver);
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if (!g_lib)
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{
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SSNES_ERR("Failed to open library: \"%s\"\n", g_settings.video.external_driver);
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goto error;
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}
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const ssnes_video_driver_t* (*video_init)(void) = dylib_proc(g_lib, "ssnes_video_init");
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if (!video_init)
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{
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SSNES_ERR("Couldn't find function ssnes_video_init in library ...\n");
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goto error;
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}
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ext->driver = video_init();
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if (!ext->driver)
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{
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SSNES_ERR("External driver returned invalid driver handle.\n");
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goto error;
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}
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if (!setup_video(ext, video, input, input_data))
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{
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SSNES_ERR("Failed to start driver.\n");
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goto error;
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}
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g_video_dead = false;
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return ext;
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error:
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video_ext_free(ext);
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return NULL;
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}
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const video_driver_t video_ext = {
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.init = video_ext_init,
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.frame = video_ext_frame,
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.alive = video_ext_alive,
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.set_nonblock_state = video_ext_set_nonblock_state,
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.focus = video_ext_focus,
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.free = video_ext_free,
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.ident = "ext"
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};
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